Stockholders' Equity - Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019		Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018
Summary of accumulated other comprehensive income/(loss) [Line Items]
Total accumulated other comprehensive income (loss)	$ 16,936,527	$ 17,066,337	$ 16,506,627	[1]	$ 15,969,572	$ 16,047,831	$ 15,586,599
Foreign currency translation
Summary of accumulated other comprehensive income/(loss) [Line Items]
Total accumulated other comprehensive income (loss)	(956,454)		(719,814)
Derivative and financial instruments designated as hedges
Summary of accumulated other comprehensive income/(loss) [Line Items]
Total accumulated other comprehensive income (loss)	839,598		607,657
Total accumulated other comprehensive income (loss)
Summary of accumulated other comprehensive income/(loss) [Line Items]
Total accumulated other comprehensive income (loss)	$ (116,856)	$ (96,213)	$ (112,157)		$ (100,622)	$ (144,618)	$ (129,769)

[1] The consolidated balance sheet at December 31, 2019 has been derived from the audited financial statements at that date but does not include all of the information and footnotes required by U.S. generally accepted accounting principles for complete financial statements.